Chevrolet Cobalt Warning Lights: What They Mean

Other warnings and indicators

Brake System Warning Light

Comes on when the parking brake is set; if it stays on after full release or comes on while driving, there is a brake problem.
What to do: Pull off the road and stop carefully, check the parking brake is released, try restarting; if still on, have the vehicle towed for service. PDF page 170

Engine Coolant Temperature Warning Light

Comes on when the engine has overheated.
What to do: Pull over and turn off the engine as soon as possible. Never drive with this light on. PDF page 172

Antilock Brake System (ABS) Warning Light

If it stays on or comes on while driving, the ABS needs service; the regular brakes still work unless the brake warning light is also on.
What to do: Stop safely, turn the ignition off, restart to reset; if the light stays on or returns, have the vehicle serviced. PDF page 170

Enhanced Traction System (ETS) Indicator/Warning Light

Steady means ETS may be disabled and wheel spin is not limited; flashing means ETS is actively limiting wheel spin.
What to do: Check the DIC messages to see whether the system is off or needs service. PDF page 171

Passenger Airbag Status Indicator

ON means the right front passenger frontal airbag is enabled; OFF means the sensing system has turned it off.
What to do: If both or neither light stays on after several seconds, see your dealer/retailer for service. PDF page 168

Summarized in our own words from the 2010 Chevrolet Cobalt owner's manual (AI-assisted; every light name was matched against its cited page 2026-10-18). Your vehicle may not have every light, and other years can differ. A red warning that stays on usually means stop safely and check: your manual has the final word.